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authorBob Peterson <rpeterso@redhat.com>2011-10-27 12:16:06 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2011-11-08 09:52:12 +0000
commitdfe4d34b39b80faff52489f950a18523da7581bf (patch)
treebe478e2c4988612eef88a1669f774dd8f9f9b8af /fs/gfs2/export.c
parent20ed0535d35b74c9e4fa5777766d6e836fe3c90c (diff)
downloadop-kernel-dev-dfe4d34b39b80faff52489f950a18523da7581bf.zip
op-kernel-dev-dfe4d34b39b80faff52489f950a18523da7581bf.tar.gz
GFS2: Add readahead to sequential directory traversal
This patch adds read-ahead capability to GFS2's directory hash table management. It greatly improves performance for some directory operations. For example: In one of my file systems that has 1000 directories, each of which has 1000 files, time to execute a recursive ls (time ls -fR /mnt/gfs2 > /dev/null) was reduced from 2m2.814s on a stock kernel to 0m45.938s. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/export.c')
-rw-r--r--fs/gfs2/export.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c
index fe9945f..70ba891 100644
--- a/fs/gfs2/export.c
+++ b/fs/gfs2/export.c
@@ -99,6 +99,7 @@ static int gfs2_get_name(struct dentry *parent, char *name,
struct gfs2_holder gh;
u64 offset = 0;
int error;
+ struct file_ra_state f_ra = { .start = 0 };
if (!dir)
return -EINVAL;
@@ -118,7 +119,7 @@ static int gfs2_get_name(struct dentry *parent, char *name,
if (error)
return error;
- error = gfs2_dir_read(dir, &offset, &gnfd, get_name_filldir);
+ error = gfs2_dir_read(dir, &offset, &gnfd, get_name_filldir, &f_ra);
gfs2_glock_dq_uninit(&gh);
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